The pelican light is the best one for it, trust me I tried them all.
Nintendo blew it big time with no backlighting option, plain and simple.. As evidenced by the massive amount of complaints they have recieved the Fox, MSNBC, and CNN stories on the subject, the numerous web-sites devoted to it, the cartoon that was made about it, and the NPD group released survey among GBA owners.
They also should have made the speaker a bit better, and allowed an AC plug in port on it.
I myself own one, but can't wait till some company comes along and makes a decent handheld machine.
Till then, as I said get the Pelican Light Advance.

(We modded ours with a white LED which makes it realllyyyy good)